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- Title
Elastic differential cross-section measurement at s=13 TeV by TOTEM.
- Authors
Antchev, G.; Aspell, P.; Atanassov, I.; Avati, V.; Baechler, J.; Barrera, C. Baldenegro; Berardi, V.; Berretti, M.; Bossini, E.; Bottigli, U.; Bozzo, M.; Burkhardt, H.; Cafagna, F. S.; Catanesi, M. G.; Csanád, M.; Csörgő, T.; Deile, M.; De Leonardis, F.; Doubek, M.; Druzhkin, D.
- Abstract
The TOTEM collaboration has measured the elastic proton-proton differential cross section d σ / d t at s = 13 TeV LHC energy using dedicated β ∗ = 90 m beam optics. The Roman Pot detectors were inserted to 10 σ distance from the LHC beam, which allowed the measurement of the range [0.04 GeV 2 ; 4 GeV 2 ] in four-momentum transfer squared |t|. The efficient data acquisition allowed to collect about 10 9 elastic events to precisely measure the differential cross-section including the diffractive minimum (dip), the subsequent maximum (bump) and the large-|t| tail. The average nuclear slope has been found to be B = (20.40 ± 0. 002 stat ± 0. 01 syst) GeV - 2 in the |t|-range 0.04–0.2 GeV 2 . The dip position is | t dip | = (0.47 ± 0. 004 stat ± 0. 01 syst) GeV 2 . The differential cross section ratio at the bump vs. at the dip R = 1.77 ± 0. 01 stat has been measured with high precision. The series of TOTEM elastic pp measurements show that the dip is a permanent feature of the pp differential cross-section at the TeV scale.
- Subjects
DIFFERENTIAL cross sections; BEAM optics; PROTON beams; ACQUISITION of data
- Publication
European Physical Journal C -- Particles & Fields, 2019, Vol 79, Issue 10, pN.PAG
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-019-7346-7